Patent US3458754A successfully refreshed from Google Patents.
US3458754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverted cross field device having an arcuately segmented cathode
Assignee: General Electric Co
•
Filing: 1966-05-03
•
Granted: 1969-07-29
•
Expires: 1986-05-03
Abstract
No abstract record available.
Inventors
- 👤 Philip H Peters Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:34
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/54; H01J25/55; H01J23/00; H01J23/02; H01J23/04; H01J23/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2454337A
Cited
US2609522A
Cited
US2832005A
Cited
US3096462A
Cited
US3289035A
Cited
US3305751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |